====================================== | [ 16.351983][ T68] #3: ffffffff9f201dc8 (rtnl_mutex){+.+.}-{4:4}, at: default_device_exit_batch (net/core/dev.c:12109) | [ 16.352281][ T68] #4: ffffffff9f1f0a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) | [ 16.352574][ T68] | [ 16.352574][ T68] stack backtrace: [ 16.353025][ T68] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 16.353205][ T68] Workqueue: netns cleanup_net [ 16.353364][ T68] Call Trace: [ 16.353486][ T68] [ 16.353563][ T68] dump_stack_lvl (lib/dump_stack.c:123) [ 16.353714][ T68] print_deadlock_bug (kernel/locking/lockdep.c:3040) [ 16.353874][ T68] validate_chain (kernel/locking/lockdep.c:3894) [ 16.354022][ T68] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 16.354169][ T68] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) [ 16.354315][ T68] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 16.354427][ T68] __lock_acquire (kernel/locking/lockdep.c:5226) [ 16.354575][ T68] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 16.354720][ T68] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 16.354898][ T68] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 16.355054][ T68] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 16.355204][ T68] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 16.355347][ T68] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 16.355524][ T68] down_read (./arch/x86/include/asm/preempt.h:79 kernel/locking/rwsem.c:1246 kernel/locking/rwsem.c:1261 kernel/locking/rwsem.c:1526) [ 16.355647][ T68] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 16.355829][ T68] ? __pfx_down_read (kernel/locking/rwsem.c:1522) [ 16.355973][ T68] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 16.356116][ T68] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) [ 16.356266][ T68] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 16.356383][ T68] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 16.356527][ T68] netdev_lower_state_changed (net/core/dev.c:8709 (discriminator 11)) [ 16.356677][ T68] ? __pfx_netdev_lower_state_changed (net/core/dev.c:8709) [ 16.356855][ T68] ? __pfx_netdev_has_upper_dev (net/core/dev.c:7170) [ 16.357002][ T68] __bond_release_one (drivers/net/bonding/bond_main.c:1890 ./include/net/bonding.h:391 ./include/net/bonding.h:382 ./include/net/bonding.h:570 drivers/net/bonding/bond_main.c:2516) [ 16.357157][ T68] ? __lock_release (kernel/locking/lockdep.c:5525) [ 16.357304][ T68] ? __try_to_del_timer_sync (kernel/time/timer.c:1498) [ 16.357453][ T68] ? __pfx___bond_release_one (drivers/net/bonding/bond_main.c:2492) [ 16.357609][ T68] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) [ 16.357752][ T68] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 16.357867][ T68] ? mark_held_locks (kernel/locking/lockdep.c:4321) [ 16.358029][ T68] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 16.358214][ T68] ? __try_to_del_timer_sync (kernel/time/timer.c:1498) [ 16.358360][ T68] ? __pfx___try_to_del_timer_sync (kernel/time/timer.c:1498) [ 16.358552][ T68] ? mark_held_locks (kernel/locking/lockdep.c:4321) [ 16.358699][ T68] bond_slave_netdev_event (drivers/net/bonding/bond_main.c:4034) [ 16.358841][ T68] ? ipmr_device_event (net/ipv4/ipmr.c:1781) [ 16.358986][ T68] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) [ 16.359147][ T68] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368) [ 16.359293][ T68] unregister_netdevice_many_notify (net/core/dev.c:11575) [ 16.359474][ T68] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11516) [ 16.359653][ T68] ? default_device_exit_batch (net/core/dev.c:12109) [ 16.359799][ T68] ? rtnl_is_locked (net/core/rtnetlink.c:163) [ 16.359945][ T68] ? unregister_netdevice_queue (net/core/dev.c:11501) [ 16.360121][ T68] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11500) [ 16.360301][ T68] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11500) [ 16.360486][ T68] default_device_exit_batch (net/core/dev.c:12123) [ 16.360631][ T68] ? __pfx_default_device_exit_batch (net/core/dev.c:12098) [ 16.360812][ T68] ? mutex_is_locked (./arch/x86/include/asm/atomic64_64.h:15 ./include/linux/atomic/atomic-arch-fallback.h:2583 ./include/linux/atomic/atomic-long.h:38 ./include/linux/atomic/atomic-instrumented.h:3189 kernel/locking/mutex.h:47 kernel/locking/mutex.c:66) [ 16.360959][ T68] ? nexthop_net_exit_batch_rtnl (net/ipv4/nexthop.c:585 net/ipv4/nexthop.c:2158 net/ipv4/nexthop.c:2666 net/ipv4/nexthop.c:4010) [ 16.361154][ T68] cleanup_net (net/core/net_namespace.c:647 (discriminator 3)) [ 16.361299][ T68] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 16.361463][ T68] ? __pfx_cleanup_net (net/core/net_namespace.c:592) [ 16.361606][ T68] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 16.361753][ T68] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 16.361897][ T68] ? process_one_work (kernel/workqueue.c:3205) [ 16.362043][ T68] process_one_work (kernel/workqueue.c:3229) [ 16.362194][ T68] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 16.362339][ T68] ? __pfx_process_one_work (kernel/workqueue.c:3131) [ 16.362499][ T68] ? assign_work (kernel/workqueue.c:1200) [ 16.362641][ T68] worker_thread (kernel/workqueue.c:3304 kernel/workqueue.c:3391) [ 16.362784][ T68] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 16.362970][ T68] ? __pfx_worker_thread (kernel/workqueue.c:3337) [ 16.363114][ T68] ? __pfx_worker_thread (kernel/workqueue.c:3337) [ 16.363275][ T68] kthread (kernel/kthread.c:389) [ 16.363388][ T68] ? __pfx_kthread (kernel/kthread.c:342) [ 16.363534][ T68] ret_from_fork (arch/x86/kernel/process.c:147) [ 16.363679][ T68] ? __pfx_kthread (kernel/kthread.c:342) Finger prints: print_deadlock_bug:validate_chain:__lock_acquire:down_read:blocking_notifier_call_chain